Marieke ten Broeke has worked as a proficiency test assistant since 1999. Among other things, she is in charge of daily activities. This includes administration, drawing up target plans, preparing correspondence, completing and reading result files, and preparing reports. Marieke also mans the proficiency test help desk. Marieke is the first point of contact for participants. She provides them with the right answers, particularly in practical matters pertaining to the organisation. Content-related questions are redirected to the relevant expert. Furthermore, Marieke ten Broeke assists the proficiency test coordinator with PR tasks and with putting together the annual programme and the newsletter.